Extensions, garden rooms, knock-throughs — describe the job and get the kit list, the materials list and the sums before the mixer turns up. Concrete, brick and block, stud work and sub-base worked out and on the shopping list.
Free plan, no card needed. Pro is £24/month, with 5 days to try it.
Ask, work it out, buy it, tick it off — each step hands to the next. No app hopping.
"Extension footings Monday, what do I need?" The Gaffer lists the kit, the pump or barrow question, and what to check before the pour — trench depth, Building Control inspection, weather.
Footing volume, block count for the cavity wall, Type 1 under the slab. Each number drops into the right calculator with waste allowed.
Ready-mix or bags, blocks, DPC, wall ties and mesh land on a shopping list with a merchant link on every line.
The whole job sits on one checklist. Tick it as it goes in, share it with the brickie and the sparky, invoice each stage.
Free, no account needed. Quantities go straight onto a shopping list.
Concrete
Volume + bag count for slabs, footings, posts
Volume and bag count for slabs, footings and posts, with waste and a sub-base option.
Brick & Block
Wall area → bricks/blocks + mortar
Wall area to bricks or blocks, mortar and DPC — cavity or single skin.
Stud Wall
Timber + plasterboard + insulation
Timber, plasterboard and insulation for internal partitions.
Gravel / Topsoil
Volume + tonnage (UK bulk-bag yield)
Type 1 and topsoil in tonnes and bulk bags from area and depth.
AI-generated in under 60 seconds from your job description. Every section editable, shareable, downloadable.
30 years of trade know-how in your pocket. Straight answers to on-site problems, specific to the job you describe — and it reminds you of the bits you'd only remember halfway there.
The Gaffer
Your AI site mate
"Strip footing 8m long, 600 wide, 1000 deep — how much concrete do I order?"
8 by 0.6 by 1.0 is 4.8 cubic metres. Add 10 percent for over-dig and uneven bottoms and you are at 5.3. Order 5.5 from the mixer as GEN3 or C20 to the engineer's spec — that is not a bag-mix job, you would be looking at over 400 bags. Check the wagon can get to the trench or book the pump with the load.
Always verify to current regs. On-site conditions may vary.
Yes. Pick slab, footing, post hole or driveway; you set the depth, and it adjusts the extras — mesh, DPM, formwork and sub-base. It gives cubic metres and a 25kg bag count with waste, so you can decide between ready-mix and bags.
Yes. Describe the extension once and build checklists for the groundworks, the brickwork and the first fix. On Pro you share each with the sub doing it.
It reminds you what to book and what to keep — inspection stages, drawings, sign-offs. It does not submit anything for you. You remain responsible for compliance.